Gradual-reduction mill



(No Model.) 2 Sheets-Sheet 1.

J. T. OBENOHAIN.

GRADUAL REDUCTION MILL.

No. 308,978. y Patented Dec. 9, 18,84.

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V was 1 u KQML Attorney 2 Sheets-Sheet 2.

J. T. OBENOHAIN.

GRADUAL REDUCTION MILL.

Patented Dec. 9, 1884.

/ j m-P 3 51! lUNrThn STaThs PATENT (titties.

JOHN T. OBEXGHAIN, OF LOGANSPORT, INDIANA.

GRADUAL-REDUC'l'lON EVHLL.

EEPECIFICATION forming part ofLetters Patent No. 308,978 dated De be 9 188:4,

Application filed May 19, 1854.

T 0 at whom, it may concern;

Be it known that l, Jenn 'l. ()ennonam, of Logansport, Cass county, Indiana, have invented certain new and useful IUIPI'OYClIlGIllS in Gradual-Reduction Mills, of which the following is a specification.

This invention relates to the general arrangement of parts in a gradual-reduction mill, whereby the various steps in the gradual-reduction processes are executed in practically a single machine.

In my improved grinding-1nill the grain is fed to a machine of comparatively small dimensions, and alternately subjected to all of the various processes involved in gradual reduction.

The invention will be readily understood from the following description, taken in connection with the accompanying drawings, in which Figure 1 is a side elevation of a machine embodying my improvements, the chop-grader nearest the spectator being omitted; Fig. 2, a plan of the same, the chop-grader referred to also being omitted in this case; Fig. 3, a vertical section through one of the leg-spouts, and Fig. 4. a side elevation of the lower portion of one of the legs.

In the drawings, A represents a husk containing a grinding-mill adapted for the simultaneous performance of several different line nesses of grinding, as hereinafter more fully specified; 1 the driving-pulley upon the vertical spindle of the machine; 0, the legs supporting the husk; l), spouts formed within the legs, and leading from the separate grindingchambers of the husk; 1*], flange-joints at the outer ends of the leg-spouts, by which conneetion is made with those spouts; F, upwardlyfacing lugs near the feet of the legs provided for the purpose of supporting the chop-graders; G, a bridge-tree attached to the legs, and supporting the usual step-bcarin g for the spindle of the grinding-mill; IT, an ordinary silent feeder by which the grain is fed to the initial element of the grindinganill; I, a feed-spout leading from the silent feeder to the first grinding-chamber of the grinding-mill; J, the legspout leading from the first grinding-chamber of the grinding-mill into the base of the elevating chop-grader K, which is omit" ed from (No model.)

ber of the grinding-mill, receiving material through the dischargespout O; Q, legspouts similar o the spout M, successively arranged around the mill; R,suecessivc chopgraders; S, dischargespouts from the tops of the successive chop-graders to appropriate grinding-chambers of the grinding-mill; T, the receivingfunnels or the successive grinding-chambers of the grinding-mill; U, the final chop-grader, receiving its supply from the final grinding chamber of the grinding-null; V, the dischargespout of the final chop-grader; \V, a shaft formed by an upward prolongation of the central spindle of the grinding-mill, adapted to operate the silent feeder,'but prolonged still farther upward; X, a pulley upon the upper end of the shaft W; Y, pulleys at the tops of the central shafts of the top graders; Z, a housing-spider furnishing top bearings for the shafts of the chopgraders, and also the shaft \V; a, a gimblc-bearing at the top of the main spindle of the grinding-mill, and I) the husklloor of the grinding-1nill.

The grinding-mill consists of a central grinding-roll provided with a circumferential series of opposing grinding agents each inclosed in a separate chamber within the hush, and each provided with its own inlet and outlet, each successive grinding agent being so ar-- ranged as to yield a product liner than its predecessor. Such a mill as this may befound fully described in Letters Patent No. 289,695, granted to me December 4, 1883, for an improvement in grinding-mills, and also in an. application (Serial No. 128,247) for Letters Patent filed by me April 17, 1884,1'01' im provements in grinding-mills.

The chop-graders receive their supplies at their bases, sift the material passing through them, elevate the material while it is being sifted, discharging the finer products through the bottom outlets, and discharging the coarse 1 and direct.

product at their tops, to be reground. Chopgraders of this kind will be found fully described in an application (Serial No. 132,001) for Letters Patent filed by me May 19, 1884, for improvements in chop-graders.

The grinding-mill is driven by a belt upon pulley B. The upper shaft, W, operates the silent feeder, which is of ordinary construction, and also drives the central pulley, X. The belt from pulleyX operates all of the pulleys Y, as indicated, and consequently all of the chop-graders, though, if preferred, a series of belt-pulleys may be applied at X and each of the chop-graders be driven bya separate belt.

The chop-graders are supported vertically by the lugs F, projecting from the legs, and they are secured in position by the bolts securing the flange-j oints E. Their tops are steadied by the spider Z. The chop-graders thus, while surrounding the grinding-mill, do not encumber it or prevent convenient access to it by reason of interfering attachments. The system of conduits is extremely simple, and each individual conduit is extremely short The operation ofthe mill is as follows:

The silent-feeder spout I discharges into that reduction process of grinding. Grain enters the silent feeder, thence by the spout I it goes to the first chamber and receives its first breaking, thence through spout J from this first chamber to the foot of the first chopgrader, which occupies the position K. This chop-grader sifts out the fine material and discharges it, elevates thecoarse material and discharges it into the next grinding-chamber, where it is subjected to a finer action, and is then passed successively around through chopgraders and grindingchambers alternately until it reaches the final chop-grader U ,where it is discharged at the spout V.

It will be understood, of course, that the real product of the machine is that material which has been sifted out by the chop-graders, and that the final discharge at the spout V will amount to little or nothing.

This machine is simple, strong, self-contained, and efficient. It is capable of a result not attainable by any known machine or system of machinery capable of being operated in less than five times the space required by this machine.

I claim as my invention The combination of a gradualreduction grinding-mill constructed with independent reducing-chambers, a circumferential series of chop-graders secured thereto, and conduits between the grinding-chambers and the chopgraders, whereby the grain is subjected to a substantially as set forth.

, JOHN T. OBENOHAIN. Witnesses:

W. A. SEWARD, J. W. SEE.

series of alternate reductions and separations, 

